Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 152
adiator; a fittingknown as a union elbow is often employed in place of the second valve.(See Fig. 103.) Air=Valves. The ordinary pet-cock air-valve is the most reliablefor hot-water radiators, although there are several forms of auto-matic valves which are claimed to give satisfaction. One of… … Fig. 101. Radiator Valve forHot-Water Work, 119 no HEATING AND VENTILATION chamber, which allwvvs the air to escape. As tlie water flows in to takeits place, the float is forced upward and the valve is closed. All radiators which are supplied by risers from below, should be provided with air-valves…
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